Computing mechanism.



11 SHEETS-SHEET 1.

PATENTED JULY 10, 1906.

J. A, SMHH. COMPUTING MBGHANISM. APPLICATION TILE? JAX. 1965.

Elm/ 4.75 wvamoz No. 825,494. PATBNTED JULY 10, 1906. J. A. SMITH. GGMPUTING MBGHANISM.

APPLIATIOH FILED JAN. 5, 1905.

11 SHEETS-SHEET 3.

PATENTBD JULY 10, 1906.

J. A. SMITH. COMPUTING MEGMNISM.

APPLIUATXOK FILED FARSI 1906.

11 SHEETS-EERST 4.

.Rahn/.4.5M ammo..

PATBNTBD JULY 1o, 1906.

J. A. SMITH. COMPUTING MECHANISM.

APPLIOTION FHEB All 5, 19,05.

11 SHEETS-SHEET 5.

No, 825,494. PATENTED JULY 10, 19.06. J. A. SMITH.

COMPUTING MBCHANISM.

APPLmATIoN FILED un. 5. me.

11 slums-SHEET a.

No. 825,494. PATENTED JULY 10, 19126.

5. A. SMITH.

GOMEUTING MECHANISM. APPLIGATIQN FILED un. 5. moa.

' An 'sums-SHEET Y.

`PJUSEISTTED JULY 10, 1906.

5 A. SMITH. CGMEUTING MBCHANSM.

APPLIATIGN PILED JAH. 5| 1905.

i1 SHEETS-SHEET E.

Illd PATBNTED JULY 10, 19%. Y

J. A. SMITH,

COMPUTING MESHANISM,

APPLmATIoN rum) un. s. 190s.

1l SHEETS-SHEET 9.

No. 825,494. PATBNTED JULY 10, 1906. J, A. SMITH,

COMPUTING MECHANISM.

APPLIATIDH NLRB JAN. 5. 1905.

il BHEBZS-BHBET i6,

PATBNTED JULY 10, 19436.

J. A. SMITH.

COMPUTING MECHANISM.

APPLIATION FILED JAN. 5, 1905.

11 SHEETS-SHEET 1L I i a citizen of the United States, residing at vice, which, while csable of use in man' dif- IO i mg machine of that type in which the record- A is ' bility of error, to facilitate the reading of the Y erated.

the operation of the device and to'locate theV registering-wheels inV such position that the Y Vas transfer mechanism will'he'locked against ing' machine.

tomatic actuation at the completion of each 'full movementme a registering-wheei or VYeach UNITED srnrns PATENT OFFICE.

Jenn, AsnUnY sMnn, or cnnvnnsnn, onto, .isseNoR To ,ELL-loro rrsnna ooi/11mm', or New ross, s. Y., A conrosnrion or DELA- WARE.

Specification of Letters Patent.

Patented July 10, 1906.

application nea smug s', 1905. sum1 Na ssa'i'f.

To all whom it may concern:

Be it known that l, JOHN ASBURY SMITH,

Cleveland, in the county of Cuyahoga and State of Ohio, have invented a new and use-` ul Computing Mechanism, of which the fcllowing is a specification.

Tins invention relates to a computing deferent relations, is g esigned Apartieulary as part of a combined calculating and recording mechanism is in the form of a type-writ- The objects of the invention, stated generally, are to reduce to a minimum the possiregistered resuits of the computation effected, and iso-reduce as much as possible the movement or throw of the primary elements of the mechanism when the computing device is op- Stated somewhat more specifically, the leading objects of the invention areas foilows: A Y

First. To decrease theresistance opposed to" reading-line -or re ist'eredA number Wili not be 'obscured by s'ha o'ws. These ends are attained by'gearing an alined series of register-f upper iront corner of the com"utinge casingwith a series of somewhatV arger'wheeis. @een of theseV ias't-named or primary Wheels when given a half-rotation eifects thecompiste rotation of the appropriate registering-.1 Wheel to present Vthe igits .8 to 9, nclusive, before the sight-opening of the casing in suceessinng the carrying mechanism Yfor each denomination being errang-,odiernohal-rotaton of a primary wheei.

Second. vTo provide means whereby the prematureaction and will be automaticall unlocked and moved into engagement wit tor for said wheel is withdrawn to permit the ing it a ainst accidental movement and vwith a trans erlever e ui ed with a transferclog. The lever isqhe positively'in an ino erative position by a 'locking member. Vghon the locator is Withdrawn from the wheel to eliminate this elementof resistance to the Ymovement ofthe latter, the locking member Ais simultaneously operated to release the ,transfer-lever'and to throw the transfer-dog into engagement with the Wheel. The do thus becomesa retaining device for the AWhse Vin lien of the locator-.and subsequently advances the Wheel when the transfer-lever is operated. Third. To provide automatic means which when any one of the wheels, receives movement from another Wheel incidental Vto the operation 'of carrying, the wheels thus advanced and all the Wheels of higher order will be simultaneously locked against movement YandY'inidentaliy to reduce Vto a minimum theV number of parts depending ,for their operation upon some agency outside of the oomplutin deviee. To attain theseends, a se- 'or locking-levers forthe rimary wheels rvare so mounted and related Within thecasing thatv whenever a wheel is earriedgthe transleger-Which effects the carryignili anto- Y tica'iiy operate a looking-lever to throw the latter into engagement with the wheel, and

gthesjoolthe same securely in itsweerried poing .wheels or disks located at the extreme' The locking-lever thus operated will fal Inoki piirpiise o moving them into lookin ga'ement with the several wheels of higher or er than the one can'ied, assuming', of course, that these-other levers have not already been swung to their lookin ositiom. Theprovison'o these Wheel-loc ing evers makes itimpossihie for a'vleel 'to he carried accidentally hy the stopping of a Wheei in the Q ositiomirat which point' it engages the trans er mecha vvithY considerable iinpaot. Therefore the'iecessity for vextending the transiter-'levers above the`computing-deously automaticay swing the sevviceoasing and for'effecting their slight dew esion'by :in-outside agen to prevent the ,v a wheel to hold the hitter when the loca-'' nn 't SQ etthrivereferredV to is o viated.

Y VTo decrease the throw ofthe resetting-lover. This end is attained by gearing the resetting-lever to the Brirnarywheels, which need only be given a alf-rotation to iig-levers to the left thereof-or the eneffect the complete resetting of the registerini-wheels.

ifth. To provide means operated b the resetting-lever to automatica ly unloc the transfer-levers in order to permit them to swing as the wheels move from 9 to 0 during the resetting operation. This end'is attained by mounting a Swingin unlocking member in position to be engage and swun by the resetting-lever to move the severa locking devices out of enga ement with the transferlevers immediately prior to the movement of the latter.

Sixth. To provide means :operated by the resetting-lever at the termination of the resetting o eration for restoring the lockinglevers to t eir normal or unlocked positions'm the event of their failure to swing back when the transfer-levers are elevated. This end is attained by providing a swinging retractor which is operated by the resetting-lever as' the latter completes its retractile movement and which w en thus operated de resses the rear ends of the locking-levers an raises the front ends thereof out of engagement with the wheels. p

Other objects of-the inventionand additional structuralfeatures will be pointed out duringf the succeeding description, and the invention in its various aspects will be succinctly defined in the appended claims.

*In the accompanying drawings, Figure 1 is a longitudinal sectional view through the computing device, showing a portion of the mechanism which is referably employed to effect its operation, t e parts of the computing device being shown 1n normal position-'- that is to say, 1n the positions they assumeV before a computation is commenced-all of the wheels registering O at the sight-o ening. Fig. 2 1s a longitudinalsection o the computing device with the illustrated Wh'eel registering 9, the locator depressed, the transfer-lever unlocked, and the transfer-do thrown into engagement with the wheelg. Fig. 3 is a similar view showing the ositions assumed by the parts at the comp etion of the transfer or carrying operation. Fig. 4 is another view of the same character, showin the manner in which the transfer-levers an locking-levers are 'restored to their normal positions by the actuation of the rocker-slide projecting through thev front of the casing. ig. 5 is a plan view of the computing device. Fig. 6 is a similar view with the to of the` casing removed.' Fig. 7 is a front e evation of the computin device. Fi 8 is a transverse section ont e line 8 8 ofig. 1. Fig. 9y is a similar view on the line 9 9 of 1. 10 is another transverse section onthe line 10 10 of 1. 'Fi 11 isa detail p'ers ective view of one o the-locking-lvers.

1g.l 12 is a similar view of one ofthe transferlevers. Fig. 13 is a detail view of the unlocking-yoke for the transfer-levers. Fig. 14

is a similar View of one of the members which serve to lock a transfer-lever and to shift a transfer-dog into engagement with a wheel. Fig. 15 is a detail pers ective view ofthe device which depresses t e locators and swings the vibrators to release the transfer-levers. Fig. 16 is a detail view of the retractor for the lockin -levers. Fi 17 is a detail view showing t e relation o one of the primary wheels .and its resetting-paw] to the associated resetting-cam. Fig. 18 is a longiutudi` nal sectional view of the computing device in the first resetting position-that'is to say, with the transfer-levers and locking-levers restored to their elevated positions by the manipulation of the latch-lever reliminary to the actuation of the resettingever. Fig. 19 is a similar view with the parts in the second resetting position, the resetting-lever being partially elevated and disposed in engagement with the unlocking device for the transfer-levers. Fig. 20, is still another section of the computing device with the parts in the third resetting osition, the resettinglever having operated) the unlocking device to'release the transfer-levers and having also restored the wheels to 01 and incidentally caused the transfer-levers and-locking-levers to move down into lockm engagement with the primary wheels, and ig 21 is a section showing the parts in the last resetting position, the resetting-lever having been moved back almost to its normal position and having effected the restoration of the transferlevers and locking-levers to their normal ele- `vated ositions.

Eac part is indicated by the same chara'cter throu hout the several views.

As alrea y stated, the computing device or mechanism to the improvement of which the present invention is directed is designed more particularly for use in connection with a typewritingl machine equip ed with operating mechanism, including t e numeral-keys of the type-writer, which impart differential movement to an actuator in the form of a master-wheel which is presentable in succession to the wheels of the computing device as the printing-point of the type-writer changes under the action of the carriage-feedm mechanism. The structure, therefore, wi l be described as anadjunctive organization of a combined type-writing and calculating machine, it being understood, however, that the computing device may be em' loyed alone or in environinents other than t at in which it is heredescribed.

In'Fig. 1 of the drawings, 1 indicates a portion of the laterally-movable carriage of a Fisher type-writer, and 2 the casing of the computing device mounted in rear of thear- [iage'upon a bar 3. The carriage 1 moves relative to the computing device for the purpose of presenting the master-wheel 4 to the lseveral primary wheels of the computing de- .so A

w eel or disk .are in the present instance,

rotation and the other keys similarlyeffect-YY ing a successivel greater movement of the wheel corresponding' wlth the increase in veine 0i the keys.

The computing device includes a series of denominationai members or primary wheels h, and i, having' different denomi ational positions-as, for instance, hun edths, tenths', units, tens, hundreds; thousands, ten thousands, hundredY thou sands, and millions-the tenths-Wheel bein of double width to accommodate the decimalI s ace. These primary Wheels are engaged irect by the masterwheel e and are advance thereby. At the u per front corner of the casing 2, which is slig tly extended for their accommodation, is a second series of denominational members in the form of registering wheels or disks a', b', p, d', e", f, g', h', and fi', corresponding in denominational osition with the several rimary Wheels.

he registerlig wheels or disks are loosely mounted on a shaft 5, and each is formed with or fixed to a gear-wheel 6, eared to the primary wheelby an interme iate idler 7, the several idlersv or gears 7 being` mounted on a shaft'S, preferably directly below the shaft 5 of the registering-wheels. As shown in F ig. 6, the registering-Wheels o' b', site., are each equipped with a eripheral series of di 'ts 0 to 9, inclusive, one digit of each being observable through a sight-opening 9 in the top of the casing 2, the' .gears 6 being comparatively narrow in order to enable, comparatively Wide registering wheels or disks bearing digits of maximernf ize to be. emtplllisiyed. i It may be sts'itedinY passing that arrangement is highlyradvantageous, because when the registeringwheels are in the forni of toothed Wheels the digits are-necessarily exhibited u on theends ofthe teeth and are therefore o V.veryfsmall size. By the arr ment adopted-that is to say, by having t e digit-bearing ortions of the registering-wheels in the crm' of disks--the-size of said wheels, may be, as they considerably de- I creased without proportionately decrees' the dimensie@ of oie digits exhibited tscreen( liiy reason of the gearing described Veach registering-Wheel 'a' &c., 'viii' make tw'o comlete rotationsV .for each single' rotation of t e corresponding primary Wheel e or la,

&c., andboth rthe registering-wheels and the prima wheels will. rotatein the same direcincrement of Ymovement make nine-tenths of a complete rotation independentiy of the other of saidwhecls to present its digits successiveiy before the sight-opening 9, and during its iast increment o Y movement the next registering-wheel to the left, r the wheel of next higher order or denomination, is moved a single increment 4 or step, after which the first-named wheel may again rotate independentlgr for nine- Ytenths of a complete rotation be ore the ad- VValeentY Wheel to the left is again advanced a single step. Since the wheels of the entire Yseries are related to one another in the manner stated, it follows that mechanical computations in addition may be effected by mov- `ing the Wheels corresponding in order to the order ofthe digits composing the numbers to be added a number of increments corresponding to the unitary vaines of such digits. Thos if it is desired to add twenty-three and forty two, the ciphers of all .the Tvheels bein pposite the sight-openin the Wheel o the second order to Wit, tie tens-wheel-wiil be rotated twoY increments, presenting the digit 2 opposite the sight-opening. The' unitswheel of Vthe rst order Will now be rotated three increments or s aces and the nu merels observable through t e opening in the casing'will read 23, corresponding to the first number;Y The second number, 42, will now be added by imparting to the tens-Wheel four additional increments of movement and to the units-wheel two additionalincrements, thus causing the numerals presented before the sight-opening to read 65, the sum of the two numbers'. `Since the numerical value of each order or denomination in the decimall system. is ten and Since cach wheel representing an order will during its last increment of movement be augmented by a single A of the next adjacent wheel to the left, it follows that Whe-nth@ IDO nnmb'er registered reaches the iimit of Vthe Y numerical value of a given order. the rotation the registration of a' digit of the next'hidhe'r denomination. "Thos Y assuming the units- Wheel to be given Ynine increments of movement, causing theY presentation of the digit 9 opposite-the sight-opening, the next, or l tenth, increment o movement will present' the f on said Wheel before the opening, and'bytheautomatic advance Vof the tens Wheel the latter will be moved a'slngle Vincre- Y ment to present the digit l before the sight-opening,

ders ,effecting the registration of the number' 1(3.A Y l The treesmngr carrying'mchcntsm.- The transferring or carrying mechanism is that Aarranger-nent of parts whereby when 'a' iven registeringewheei moves from "9 to A the adjacent wheel of higher lorder'will 65 tion. ach registel'ing'whecl is arranged to Abe automatically advanced 'a single incre- *of the adjacent wheel to the left will client no its 12C the presentation of the inveim f digits 0 andVln in the units and tens or-YV Acomplete rotation between carryin ment. In'rear of the 'primary wheels is disposed a transverse supporting-rod 10, u on which are mounted a series of indepen( ent transfer-levers 11, one of these levers being arran ed opposite each of the primary wheels with t e exception of the wheel a, for which no lever is provided.

The transfer-levers are arranged to swing from the rod 10, and each is formed with -a pointed tailpiece 12, engaged by a swin ing detent 13, urged to its engaging position y a s ring 14 and designed to yieldinglyretain tide lever at either limit of its movement. The levers 11 are of irregular form and each is provided at its front end with an arm 15, to which is attached in a laterally-offset position (see Fig. 12) a contact-plate 16, extended between a pair of primary wheels and also received in one of a series of guide o enings or notches 17 in a guide-bar 18, exten ing across the casing. (See Figs. 1 and 9.) The front end of each contactlate' 16 is arranged to be engaged by either o a pair of lugs or projections 19, preferably -formed integral with a primary gear and extending laterally from a side face thereof at diametrically opposite points. (See Figs. 1 and 9.) This engagement of a projection 19 with the contactlate 16 of the transfer-lever does not occur, liowever, until the primary wheel has moved nine increments, the purpose of the en agement being to swing down a transfer ever for the purpose of effecting a single increment of movement of the adjacent primary1 Wheel to the left of the primary wheel whic moves the transfer-lever, this advance or carrying of the adjacent primary wheel of the next higher order or denomination effecting a corresponding -advance of the registeringwheel geared thereto. At this point attention may be directed to the fact that the carrying or transferioperation takes place each time a registering-wheel makes one complete rotation, and as this carrying is effected by the primary wheel the latter must necessarily be rovided with two lateral projections or cai-1P'- mg devices, since it makes one-half only o a operations. The connection between eac fer-lever and the wheel served or carried by it is established through the medium of a transfer-dog 20, having a flat lower end designed to extend over and engage one of the peripheral teeth of the adjacent primary wheel.

' The dog 20 is'pivotall mounted at its upper end upon the arm 21, ormed at the ront end of the transfer-lever above and in spaced relation to the arm 15, the swingingmovement of the dog relative to the lever being limited b a stop 2O'1 extending from the lower end o the dog and engaging a recess 22 in the upper edge of the arm 15. (See Figs. 1 and 1 2.)

The front face 23 ofeach transfer-dog is curved longitudinally, sothat that part of the dog which engages a primary wheel has the transf form of a tooth. (See Fig. 2.) Similarly, the rear face of each dog is curved, so that it will describe an arc substantially concentric with the axis of the transfer-levers when the dog is in its wheel-engagin position. Assuming that the primary whee (shown in Fig. 2) is the units-wheel and that it has rotated nine increments to-exhibit the digit 9 on the units registering-wheel before the sightopenin 9, it will beseen that the next increment o movement of the primary wheel will cause one of the projections 19 thereon by engagement with the contact-plate 16 to swing down a transfer-lever. As the transfer-dog 20 of this lever will be in its engaging position, as shown in Fig. 2, and as such engagement will be with the tens-wheel, the described advance of the units rimary Wheel and the consequent swinging o the tens transfer-lever will advance the tens primary wheel one increment, so that the tens registeringwheel will be moved to register 1 before the si lit-opening, while the uijits re staringwhee is moving from 9 to "0 When `the transfer-lever is o erated in this manner,

the carrying-dog gra ually moves out of engagement with the tens-wheel, for the reason that its front face is engaged by a tooth of the wheel, which acts as a cam serving to swing back the dog, and thus effect the complete disengagement thereof by the time the carrying operation is completed. Before this disengagement is eiiected, however, the front en 2 of the' transfer-lever will en age the upper corner of a tooth of the tens-w cel and will exert more or less downward pressure thereon, so that notwithstanding the disengagement of the transfer-dog 20 the o erative connection between the transferever and the wheel will be maintained, thus insuring the transfer of u. complete increment of movement to said Wheel. At the completion of the movement the side face of one of the teeth of the tens-wheel will be brought into engagement with the end 25 of the transferlever, as shown in Fi 3, and the projection 19 on the units-whee will have moved out of engagement with the contact-plate of said lever. In this position ofthe parts (see Fig. 3) the tens-Wheel will be locked by the transfer-lever, and the units-Wheel which has just effected the operation of said lever will be capabl of continued movement independen tly di the tens-wheel.

As the transfer-lever moves down theV point of its' tailpiece will swing relative to the detent 13, and as the point of the tailpiece passes the point of the detent the latter, urged u Ward by its spring, will exert more or less orce, tending to continue the movement ofthe lever. This is advantageous, for the reason that in the event of slightlylos premature disen agement of the projection i 19 of the units-w eel from the contactlate 16 of the lever the movement of said ever would, neveriheoss, be ompleted, and thus e compieteroarrying operation would be insured.

The mechan'isbedjor locking the transfer-Zeoers against ac entail depression. and for positively bringing `the transfer-dogs 'into en gogement with the rimer?! wheelsfwlt is desirable to positive y lock'the trensier-'leversV in their normal elevated positions, and itis also desirahieto positively move Vthe trims-V fer-dogs into engagement with the Whe-eiste he carried by them. The loekingof eeeh le ver and the positive movemeot of the dog carried thereby is effected by the semeeiement. VOn a shaft 26, extending transversey of the easing 2, adjacent to the lower front corner thereof, ere mounted e-series of vibrators 27,'eor1esponding in number and denominational position to the trepser-levers 1I. Each of these vibrators is formed with a. vertical arm 27 and with a horizontal orwardly-extending arm 27", the front eX-'- tremities of the several arms 27h of the. vi- -brators being extended through the front n'all of the casin 2 Vand each ermedwth a point Ved upper e ge 27.; The vertice! arm 27 of each vibrator is reduced in thickness, as shown-in Fi s. l0 and 14, to permit the upper portion t ereof-to extend between a pair of transfer-levers and is provided at its upper extremity with e lateral extension or iug 27d, extended over the lower arm 15 of a transfer-imei, as shown in Figs. I and 10.` The reer edge or the -lug 27d is normally retained in a notch 2S, formedin the front ed e of the transfer-lever immediately above te arm 15 thereof, this notch being of angular form eorrespondin to theian olor form of4 the rear edge of te lng, sfo t at 'when the 4o parts ere ,in enga ement ythe transfeniever" Will-'be positivelyocked against movement in -eitherl direeton. Each ,vibrator is retained in its normal or locking' position b a vj spring 29, backed b; a ber v30, extending across theeasng and e p A der formed on theyibrator, At the 'repen time, howeveathje front en'dY othe vi rater. 27 is de ressed by a. vibrator-actuator 31, having tie form ,of a horizontai bar wthhv-i 5o -eled ends, (see 15,) whieh is e1.1 p`pn'tedn vh and moves w1th the type-wrtmgma Ye ine carriage I. the emageedvanees in the direction of letter-spacing the fend ofV this har-or actuator 31 rides over and1de-- presses the front end oa vibrator 2? in oplpof seien is 'the s wieg e9. ,The viel-eter is t es rocked from t e position shown in Fig. 1 to that shown in Fig. 2y thismovement servir. -todraw the oeki -lug 27d out of theenote the-letter, and thus permitir Subqent'def pression. At the 'same time'thisvmoven'le t@ fof the vibrator presents' the=lug279to the ,y lowerend 0f. th -earrying-dog 2 0 and swings- 'which b5 the latter positivelytor-its` engaging position.'

(Shown in Fig. 2.) Thetranser-lever bein` thus released andt th -transfer-dog engage with the-Wheel served by it, the'oarryin op'- eration may be effected inthe manner eretofore described, .thefunis-wheel; for' i11- stance, serving to swin dovlfrthetransferlever, whose transfer-ig vsil 'advance or Gerry the tens-Wheel one iecrement. Ob'viously the vibrat ors ,27 ma he operated manualiy, since their front ends areexposed upon the exterior of the easing.

The wheetlooeting mecsanism--To insure exact alinement oi'the digits opposite the sight-opening and to prevent possible reverse rotation of the Wheels a series of Wheelloeators 32 are provided. "lhese loeators are in ther-form of independentlywnging arms mounted-upon e transverse rod l33, extend8 ing across the casing above. the bar 30 and each havingY "af pointed loeatn -tooth' 34, Yen,{ o.ges between the te'et of one of the primary wheelsvo b, 6to. Each locator is urgedY upwardly b a spring 35 -lend'hefs its front end lextezidedr through and beyond Vthe rontwell' ofthe easing 2, iwhere it is thinned.

with a pointed or sharp upper edge'36,si'mi larto the corresponding ortions of thelvi- Ybrators 27 (See Fig. 7. 7 If when afprimary'ffh'eel'oemes to rest its nfovementj is slightlY "iineomplete, the locator-tooth subseqentlur'ged upwardly between two teeth of the Wheei V1will aecurotely locate the hitter by reason of the eamming aotion betweenthe Yinclined faces of the locator-tooth theadjar-.ent wheel-teeth engaged bv it. The several `loeoors*',732 are depresse to ease: or; relhevethe resistance opposed to the movement of thel number-Wheels Ain carrying.' While this may be done by hand, in praotoe a-'lgoeatol-depreesing plate 37, similar'to the vibretor-actaator 31, is mounted ion sind movable `with the carriage and provided with beveled ends.V

. The means for automatteelly locking the eeee carried and for smaliaiteueiy locking Y highersorder topre'l'ent oeeodentol owyitgfw en ofwhreil stops it. the 9 potmifnforder that `the' utilit f of this meoharisnr'iney he oomp'ehende ,i it

Wheel etops in the 99" position-fianet is to one of "the,"Y ro ations 19' on'the-` rinixry wheel. will Abe,,iris.engagement with v t el door. taesplete 'lrof ',ftransfer-leyer i It slome- `time bepm est when; .thefwhereee y errest'edgntle 'osition the impeet'ethe l projection 'i9 al; einst th' 28'V the transfer-f over' to reeeseortggook.

oiently` .violen h @16 Nigel served rvent t f is'e oi g to frryizig it'has heenjprooeed denree oftheI loo Cin'

their contact-plates from being struck by the rejections 19 under the conditions stated,

he roposed arrangement, however, 'contemp ates the extension of the transfer-levers outside of the casin 2 and the depression thereof by an outsi eagency. In accordance with the resent invention no rovision is made for this-sl-ight movement of) the contact-plates away from their 'normal positio'ns.; but in lieu thereof a series oflockinglevers are so arranged within the casing that they will automatlcally* lock certain of the wheels to prevent the same from being accidentally carried in the manner stated, the locking being automatically effected when any Wheel is carried and serving to si- 'multaneously lock the carried wheel or wheels and also the wheels of higher order. These locking-levers 38 (see Figs. 1, 6, 9, 10, and 11) are fulcrumed upon a shaft 39, disposed transverse of the casing above the transfer-levers. Each locking-lever is formed with a weighted rear end 40 and with a curved front end 41, which latter is designed to swingl down into engagement with a primary W eel just as the latter completes its movement under the im uls'e of a carrying or transfer lever. The loc ing-levers 38 correspond in number with the transfer-levers 11 and are located directly above'the latter. This arrangement is adopted in order to ermit each transfer-lever when operate to transmit motion from one wheel to another to simultaneously effect the automatic ,actuation of the adjacent locking-lever for the purpose of swinging the latter into locking relation with the wheel to which motion is transmitted. Formed on the upper; edge of each transfer-lever 11 in rear of the fulcrum thereof is a cam extension 42, engaging the Iunder side of the weighted rear end of a locking-lever 38, as shown in Fig. 1. When the front end of the transfer-lever is thrown down in the act of carrying, the cam 42`moves up, and thusswings the locking-lever 38 to the locking osition, as indicated in Fi 3. When a locking-lever is\thus operate it-automat ically effects -a ycorres onding operation of each lookin -lever to t e left, so that'when any one of t e prima wheels is moved by a transfer-lever it will e locked by a lockinglever 41, and all of the wheels of higher order will be simultaneousl lockedby `the depression f' the other loc g-levers to the left.

To attain this end, each lever 41 is provided in turn depress the nextlever, and so on, the

movements of these .several levers connected (See Figsl, 6,' 9,

by the lugs 43 being simultaneous. The locking-levers to the right of the4 lone thrown down by a transfer-lever will rvnain in their elevated positions, for the rearlthat the lever thus thrown down to lock the carried wheel will merely move away from the overhanging lug 43 of the adjacent lever to the' right.' As a result of the arrangement shown it follows that the wheel to which motion is transmitted in the act of carrying will be prevented from moving beyond the proper point and that all the wheels of higher order will be locked, so that even if a prolection 19 on one of the wheels should strike a sharp blow against `the contact-plate of transfer-lever it will be impossible to effect a false carrying movement of any wheel.

The means for restoring the transfer-levers cmd locking-levers to the'w' 'normal positions under normal condttfionaMounted to swing from a transverse bar. 44 (see Fig. 1) is a rocker 45, disposed opposite a cam-face 46, formed on each of the transfer-levers 11 in advance of their common fulcrum. When the transfer-levers; or any of them, are thrown down to their depressed positions, as shown in Fig. 3, their cam-faces 46 are moved cl ose to or 1n contact with the rocker, so that when the latter is rocked back the levers will be raised or retracted to their normal positions, thus permitting the locking-lugs 27 of the vibrators 27 to move back intoengagment with the notches 28 in the leversto lock the latter in the manner heretofore described. This movement of the locking-levers withdraws the cams 42 from the rear weighted ends of the lockin -levers 38, which drop back to their norma or disengaged ositions. The rocker -45 is rovided with a epending arm 47, connecte at its lower end-to a slide 48 to facilitate its actuation This slide has a beveled front 'endAQeXtended through the front end of the casing 2 to facilitatets actu-` ation, it being understood that the forcing of this slide backward or inward effects the fer-levers to .normal position.

IOO

.los

When the computmgdevice is used in coni nection with ra t e-writin ymachine, this slide 48 is moved m orback y. arocke'r-slide actuator mounted on the carria e 1, This actua'tor constitutes no part oft e present in- 1 Y vention and for that reason is not shown. It may be stated, however, in-passingthat dur'- ing the retraction of the type-writing-machine carriage this actuator operates, the

slide 48 to restore the transfer-levers to their been completed. At the beginmng of the remechcnfismfi-The resetting i tions.

cam by a spring 54. When all of t settinghoperation the parte will be in the positions s own in Fig. 2?,A the transfer-leversI and locking-levers being in their en aging oei- Fixed upon a rotary sha t 50, w 'ch carries the several primary wheels a b, &o., are a series of resetting-cams 5L alternating with the wheels and each formed with a pair of shoulders 52 at diametrically opposite points. The shoulders of the several cams are normally alined and occupy the positions shown in Fig. 1S. This ligure may be said to disclose the first resetting osition, since the parte are in the positions t ey assume at the end of the rst step of the resettin operation. Mounted to travel upon eac of the resetting-cams is a resetting-pawl 53, pivoted upon the adjacent primary Wheel arid having its beak urged toward the peripher fortl'ie"Y e registering-wheels are registering il before the sight-opening of the casing2, the beaks of the several awls 53, carried by the primary wheels, will e in enga ement with one of the elined series of -shoul ers of the earns. As the wheels are advanced one or more inerements the pawls will moveaway i'romythe shoulders 52, andwhenl a given computation has been completed the pawls on the several wheels will obviously occupy various ositions with relation tov the shoulders o the cams. Therefore if the shaft 5i) is rotated in :the proper direction thev shoulders of 'the lthrowof this lever is just cams, moving with the shaft, will sp roach and engage the pawls of the wheels, an when l said shoulders have arrived diametrically o posite the point from which theyr started each rimary Wheel will have. been advanced a su cient distance to'cause each of the several registering-wheels to register zero. For the purpose of imparting the necessary movement to theshat 5f) the latter is provided ad-iacent to one end with afpiniorr 55, engaged by a toothed segment u on the' rear "end of a resetting-liever 57 fu crumed upon a bearing-screw 58, rejecting inwardly from one side wall o'f t e easing 2. TheV sufficient to effect one-half of a complete rot-ation o1 the 'shaft ',56. .It therefore follows wheelswjll be reset.

:retained in its" normal in the forni'ola small [lever and engaging a notch in th'e easing 2.

'latch-lever 60,pivotallympunti tirg-leverat 615 and limited in its movement ependent of the leverY by a stop- Ain 2'enthat `by swinging 'the iever from the position shown in Fig. 1S to. that s ihvzniv'nl in Fig. 20 the registering,- The `resetting-lover :is position'by a latcll'ii b ook -pivote'd'upon the This latch is arranged to bevo rated by s.

onthe'resetin gagin Va'slot in the level: fn .It wi olivi ous t attheresetting-lever cannot be 'opere' 1 ated aslon sarthe primaryvwl'ieel `remain -tor ftbis reason ,thel ustrated structure includes means whereb .thetrans ier-levers and lockingdevere thrown 'setting-lever 57 is. serves to swing the latch-lever 6G from theV swinging arrr', having an angular upper Y end 64, p'ivoislly mounted upon a bearingscrew 65, projecting from a eide Wall of the casing 2. i At the up er end of the arm 63 at apoint in advance o its axis isa lu 66, die

posed to be engaged by the inner or ont end of the latch-lcv0r 60, the lower end ci the arm 63 being connected by a link 67 siilrthe innerer rear enel of the rockerhslide e8. As

'sninngthat the parts occupy ilies'positions indieated in Fig. 3 and that it is desired' to rceet the computing device, the endoi the regrasped. This action Vposition shown in Fig. 3 to that shown in Fig. I8. thus cassis pressed and thelower end of the arn`163 to be swung rearward iy to retract the slide 48 and operate the rocker 45. Thus the swinging of the latch-lever 6() simultaneously effects the release of the resettingdever and shifts the rocker 45 to elevate the transfer-levers l1 to their normal positions, as show-nin Fig. 18. This elevation of Y the transfer-levers w'fithdraws the cams 42 from the lookin -levers and permits the latter to swing to t cir unlocked positions onder the impulse of their Wegted rearenids.

the projection 66 to be demeaaefr ceasing lthe latch-lever to re- Vlease the kicking-koers rom the,wieels.-To the locking-levers to avoid ssible failure swing ack under the impulse of their weight.- ed ends, provisiopie marie for positively retracting `the locking-levers by means of. the latchlever fill when the latter is swun'to Withdraw Vthe latch 59 from the casing'.

point adfaeent to tlieupper rear corner of the casing .2 is located a lockingdever'retractor 68, (ses Figs.: 6,16, and 18,) 'mounted to swingrlrorn a shaft 69 and pi'oyided adiacexnF toftheopposite sides of the casing with arms 'aititl` the latter having van angular'end '72i Whl proiects over the rearV ends oi' one or tive ofthe lookin -levers atthe left-hand 'end if the series. See Fig. 6.); The'front traetorf Vtizijiffngslrg.;theangillar end 72 ofthe 'casing 2 is disposed under' Y66 on thearm '63; Therefore when @ssii @press this reef ends 0f She lock inge-'levers engageY it.V The front ends of ithese "lockingLlevers 'are' thus swung up, 'and this motion 1s cornmunicatedio the entire series-of levers'V by reason ofthe fact that as eaeh is elevated it 'strikesV the lateral projec-v 43 of the adjacent vlever of lower order and moves'saidylver with it. Thus it will be seen that the swiiiing'of the latch-lever at,

the beginning of the resetting operation effects, first, the withdrawal of the latch to release the resetting-lever; second, the swinging of the rocker 45 to elevate the transferlevers, and, third, the swinging of the retractor 68 to effectthe simultaneous retraction of the several locking-levers, these three f unetions, however, being performed simultaneously. The parts will now be in the positions indicated in Fig. 18, and the second step of the resetting operation will next be performed. This step consists in. elevating the resetting-lever 57 to rotate the shaft 50, and thus cause the cams thereon to pick up the resetting-dogs 53 und move the same around until the wheels are made to re ister zero in the manner heretofore explaine As soon as the latch-lever is moved out of engagement with the arm 63'by the upward movement of the resetting-lever 57 the arm 63,. the slide 48, and the rocker 45 will be restored to their normal positions by a retracting-spring 73, connected at one end to the casing and at its opposite end to the arm 63. (See Fig. 19.) When the resetting-lever 57 has reached the position shown in Fig. 19, the parts will be in what is known as the second resetting position, the resettingcams being two increments removed from their final resetting positions. In other words, the registering-wheels will be showing Ss before the sight-opening and a projec- "ion 19 on each of the primary wheels will be one step or increment removed trom the adjacent projection 16 of a r4transfer lever. then the nekt step or increment of movement is imparted to the primary wheels by the resetting-lever, these projections 19 will move into engagement with the contactplates 16 of the t1 ansfer-levers and the several wheels will be in the 9 position.

The means operated by tieresetting-lecer to unlock tlm rcmsfer-lecers.*fe have already seen that whenever a primary wheel moves from 9 to "0 in the normal operation of the device a projection 19 thereon engages a contact-plate 16 onatransfer-leverand shifts the latter to its depressed position. lt follows that during the resetting operation which is now being described the same operation necessarily takes place-that is to say, as the primary wheels are being reset by the transfer-lever their` movement from -9 to "0 is necessarily accom anied bv the depression of the transfer -rlevers We have also seen, however, that when the transferlevers are in their elevated positions, as shown in Fig. 19, they are locked by the lugs 27 on the vibrators 27. It is therefore necessary to provide means whereby the resetting mechanism will be made to operate the' vibrators 27 to release the transfer-leversA 11 before the primary wheels begin their movement from 9 to 0. This end is attained by providing a swingingr unlocking member or yoke 74, (see Figs. 13, 19, and 2(),) pivotally mounted at its opposite ends upon the side walls of the casing and having its transverse bar disposed to engage the rear edges of the several vibrators 27 when the yoke is swung in a manner to be described. The j right-hand end of the yoke is extended be- E `vond the axis thereof to form anv unlocking j arm or cam 75, extended into the path of the segment 56 of the resetting-lever. When the resetting-lever 5,7 is swung up to the position indicated in Fig. 19, the primary wheels will be in the i8 position and the segment 56 of the resetting-lever will engage the upper end of the arm 65 of the unlocking-yoke 74. This position of the parts is shown in Fig. 19, which,- as before stated, is the second resetting position. As the upward movement of the resetting-lever continues the unlockingyoke 74 will be swung, thus urging the vertical ends of the vibrators 27 forward to withdraw the lugs 27d thereof from the notches 28 in the transfer-levers. The transfer-levers will thus bereleased or unlocked while the wheels are moving from 8 to 9, and therefore when the wheels are moved from 97 to 0 the projections 19 thereon may cause the transfer-levers to be Vthrown down, the locking-levers being incidentally rocked to their engaging positions. This third resetting position of thearts is shown in Fig. 20, the resetting-lever eing at one limit of the sight-opening, and the transfer-levers and locking-levers being depressed.

transfer-levers. and locking-levers to normal yiosiflfion when the resetting-Zever is moved linda-Of course when the wheels have been reset it is necessary to restore the transfer and locking levers to their normal position before another computation can be effected. The resetting mechanism therefore includes, in addition to the latch-lever for unlocking ,the wheels prior to theresetting thereof, other mechanism for unlocking the Wheels after the latter have been reset. eludes a block 76, pivotally mounted at the rear-end of a swinging support 77, constantly urged upward by a spring 7'8, connected at one end to a fixed part and at its o posite end to a tail iece 79, extended from t e suport 77. T e block 76 is normally retained y the resetting-lever in the position Vshown in Fig. 3; but when the arm 63 is thrown back by the latch-lever at the beginning of the resetting operation, as shown 1n Fig. 18, a projection or shoulder 80 on the arm 63 moves down to the position op osite the lower end of the block 76. With t e arts in this position-to wit, that shown in Fig; 18`- it is evident that as soon as the resetting-lever 57 moves up the su port 77 will be swung by its spring 78 and-t e block 76 will move over the projection 8() on the arml 63, and therefore when the said arm is retracted by its movement, tle wheels registering 0 at The means for causing the return of the This mechanism in- .n .1t of the block, together with di erent aires, will effect resetting position, it will contact with theV upper end of the block 76 and force the latter down, thus swilging the arm 63 to operate the rocker 45 an the retractor 68, the rocker serving to elevate the transfer-levers and the retraetor simultaneously withdrasiin the primary wheels. the b ook 76 continues to move-down with the latter is restored to its normal position it wiii be swung sli htly on its individual axis by reason of the act that the upper face 8l is slightly inclined, and thisindividuai movethe swingin of the support 77 and the arm 63 from the disengagement c. the block from the projection 8U, the positions assumed by these parte being shown inV Fig. 21. As soon as the block 76 is disengaged from the arm 63 the latter will be re- Y vWheel v4 is opp n between the elements of the computing de. vice and the"actuating mechanism mctmtedYY on the carri ,iss

vlbe ful comprehende x4tolse tracted by its s ring 76, the iug 66 on the arm being presente to the latch-lever.. The various parts of the device Willnow have been restored to their initial positions, (shown in 1,).and another computation may be inau ated.

Vdjacent to the upper front corner of the computing-device casing 2 is a grooved track 82, upon which is designed to travel an antifriction-roller' 83, carried at. the end of a brace 84, 'extending rearwardly from the carriage 1. The roller of this brace is designed to engage the track Whenever thel masterosite the computing device, which letter is thus held ri idly in position to insure the maintenance cig a proper relation It is the a'it that from the'foregoing-the operation o the computing mechanism' wiii It shonid be 'underowever, that the illustrated structure snsceptibie 'of considerabie variation and that the right to eilect such ch e's, modifications, and variations as may fa within the scope of the protection prayed is therefore ressiy reserved.

atI' claim is- 1. In a computingdevice, a series of wheeis, a series of transfer-levers each arranged to transmit motion from onewheel to another and a series of iockin -ievers each arra ed moved by one wheel to eng e endiguer wheel and to hold thesame iocked nrng the movement of e wheel or wheels of lower order. 2. In a computing device, a series of normolly unlocked denominational members,

stood,

members therefor, and Yiocking member will cerate another.

the resetting-haver When' therefor, and locking-ievers nominational members,

carryingY Ymechamlsm therefor, and means Ywhereby when'any member is carried, said member and the members of higher order wiii be automatically locked.

3. In a computing device, a series of denominational members, a seriesjof ioclnng means whereby one 4.111 Vacomputing evice, a series of denonnns'tio'nal members, carrying mechanism therefor, a series of looking members for the denominationa members, and means whereby any locking member which is moved to its locking -levers from eng ement sfit the engaging position Wiii eect arsimiiar movemento other iocking members to lock other denominational members.

5. In a computing device, a series of denominationai members, car mechanism I'binie members, said levers having portions thereof disposed in overlapping relation, whereby the movement of anllever wili canse a lever or levers at one side t ereof to be moved in unison therewith without operating the levers located at the i other side of the one o erated.

6. In a computing evice, a series of denominational members, carrying mechanism therefor, a plurality of locking-levers, each arranged to 'be operated by the carrying mechanism,` and means whereby one lockinglever will be caused to operate another. Y

An a computing device, a series ofdenominationalmembers, carrying mechanism therefor including a series of transifnleversl arranged Vto transmit'motion from one mem-` ber jtri-another, a series of locking-ievers each die osed to be operated by a transfer-lever, andj'lneans whereby any locking-lever when operated will move one or more of the other iocking-ievers.

8. In a computing device, a series of denominetionai members, carr mg mechanism Ytherefor including a series o transfer-levers,

a series 'of counterweighted locking-levers,

Vsaid Vioelring-,levers being disposed for operation-.bythe transfer-levers, and means for restoring the transfer-levers to normal ositon and for withdrawing the same romt e locking-levers'to permit thelatter to swing back to their reieased or nniocked positions. 9. In a computing device, a 'series of de- IOS I Io

nominational members, carrying mechanism therefor including a' series of transfer members, and ioeking mechanism for said transfer members, said lookin mechanism being extendedt to the exterior o the computing device for actuation. J Y

10.' In a computing device, a series of-'de- I carrying mechanism therefor incindng a series of transfer members, and a'- series 'of vibrators each arranged to and' 'sitively lock a transfer memjbeligxten Aed to the exteriorof the computng device for actuation.

11. a, computing device, a series of de- 

